Objective: Hypoglycemia is a challenging clinical condition with a broad differential diagnosis, particularly in patients without diabetes. Identifying the underlying etiology is crucial, as management strategies vary significantly.
Case report: We report a case of severe postprandial hypoglycemia in a 19-year-old woman that developed shortly after an uncomplicated cholecystectomy. Extensive evaluation ruled out insulinoma, autoimmune hypoglycemia, and factitious causes.
Discussion: The temporal relationship with surgery, postprandial symptom pattern, and unremarkable imaging suggested bile acid-mediated metabolic dysregulation due to altered bile enterohepatic circulation. The patient responded well to dietary modification and acarbose therapy.
Conclusion: This case highlights the need to consider cholecystectomy in the differential diagnosis of postprandial hypoglycemia, especially when classic etiologies are excluded.
Keywords: bile acid–mediated metabolic dysregulation; cholecystectomy; hypoglycemia.
© 2025 American Association of Clinical Endocrinology. Published by Elsevier Inc.